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3 years ago

Will give brainest!!!!

Mathematics

2 answers:

Tresset [83]3 years ago

6 0

Answer:

x = 28/3

Step-by-step explanation:

We can solve this problem by using similar triangles:

Both of these triangles have a 90 degree angle and they share angle A, meaning that they are similar by AA similarity.

Now we can set up ratios and solve:

13/7 = (x+8)/x

multiply both sides by x:

13x/7 = x+8

Multiply both sides by 7:

13x = 7x + 56

move the 7x over and divide by 6:

6x = 56

x = 28/3

ser-zykov [4K]3 years ago

6 0

Answer:

9 1/3 or 9.3333333333

Step-by-step explanation:

Triangle ABC is similar to Triangle ADE because they are proportional. It is a 7:13 ratio as shown by segments CB and ED.

Therefore, the ratio from AB to AD would also have to be 7:13. The ratio as shown by the picture is x:x+8. Therefore x:x+8=7:13.

Now you put this in fraction form. $\frac{x}{x+8}$ = $\frac{7}{13}$ You multiply both sides by X+8 and get X= $\frac{7x+56}{13}$ . Now you multiply both sides by 13 and get 13X=7x+56. Now you have cleared the fractions so it looks neater. Next, you subtract both sides by 7x and get 6x=56. Finally you divide both sides by 6 and get x=9 1/3

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Answer for all 3 boxes please :)

Cerrena [4.2K]

Answer:

$m=-\frac{5}{3}$

Step-by-step explanation:

6 0

2 years ago

Solve these simultaneous equations. 4x – 7y = – 5 3x – 2y = – 7 Solution: x=

AlexFokin [52]

Answer:

$\huge{x = - \frac{5}{4} + \frac{7}{4} y}$
$\huge{x = - \frac{7}{3} + \frac{2}{3} y}$

Step-by-step explanation:

1. $4x - 7y = - 5$

$4x = - 5 + 7y$

$\boxed{\green{x = - \frac{5}{4} + \frac{7}{4} y}}$

$y E R$

○○•○○

2. $3x - 2y = - 7$

$3x = - 7 + 2y$

$\boxed{\green{x = - \frac{7}{3} + \frac{2}{3} y}}$

$y E R$

5 0

3 years ago

Find (f+g)(x) if f(x)=3x+10x and g(x)=5x-3

otez555 [7]

3x-5x+3 Answer:

Step-by-step explanation:

7 0

3 years ago

Drag each tile to the type of interest rate it describes

sertanlavr [38]

Answer:

Nominal Interest Rate: Does not consider inflation provides a sense of purchasing power

Real Interest Rate: It describes the stated interest rate on an account and also considers inflation

Step-by-step explanation:

Real interest rate can be defined as the Nominal interest rate minus the inflation rate.

Nominal Interest Rate is the interest rate without taking into account the inflation

6 0

2 years ago

How many women must be randomly selected to estimate the mean weight of women in one age group.we want 90% confidence that the s

mojhsa [17]

That is a very good question....

Look Grank

you know that:

confidence interval = mean +or- Margin of Error

and

Margin of Error = (z)*(standard deviation) / (sqrt of n)
where n is the number of sample records

So we need to calculate z-value firstly

It says: "we want 90% confidence"

So that:

confidence90% corresponds to z-value of 1.645

Plug that into our formula of Margin of Error:

Margin of Error = (1.645)*(22) / (sqrt of n)

"The sample mean is within 2.7 lb of the population mean" means that Margin of Error is 2.7

Margin of Error:

2.7 = (1.645)*(22) / (sqrt of n)

Now solve for n:

n=179.66~180

SO that 180 women must be randomly selected to estimate the mean weight of women in one age group.

7 0

3 years ago